Model: 556-6408988-B-16

Socket Head Cap Screw

Special Features:

Screw cap self locking; fasteners covered by mil-s-1222 and referred to this note shall also conform to a of 12% elongation in a length of four diameters

Properties:

Thread Class
3a
Thread Direction
Right-hand
Fastener Length
0.750 inches
Thread Diameter
0.312 inches
Thready Qty Per Inch (tpi)
18
Material
Steel
Material Specification
Mil-s-1222, type2, grade574 military specification 1st material response
Thread Series Designator
Unc
NSN
5305-01-474-1359
Part Number
556-6408988-B-16
Description
Screw,cap,socket Head
CAGE
53711

An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See bolt, internal wrenching. Excludes screw, shoulder; and screw, machine.

Part 556-6408988-B-16 NSN 5305-01-474-1359

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
16282
FIIG:
A003B0
Concept No.:
App. Key:
SC
Cond. Code:
1
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
096640
UFC:
50600
LTL:
70.0
LCL:
--
WCC:
713
TCC:
Z
SHC:
9
ACC:
Construction Materials

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Schedule B and Export
  • Schedule B: 7318152000
  • SITC: 69421
  • End Use: Iron and steel products, other
  • NAICS: 332722
  • USDA: 1

Freight Class: Bolts and bolts and their nuts or washers exported in the same shipment

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